Johnson MC-J6900 User manual

JOHNSON
Issue Date
2018/4/23
Edition
01
Doc No.
Revision Date
Edition
Time
2018/1
0/10
Page
47
Johnson Industries (Shanghai) Co., Ltd
MC-J6900 MASSAGE CHAIR
Service Manual
Approval
Review
Editor
Allen Sun
Allen Sun
Hans Kong

FOREWORD
Precautions during repairs and faults:
A. When disassembling, unplugging connectors and replacing parts, make sure to unplug or turn
off the power.
B. As semiconductors (IC, etc.) are prone to being damaged by static electricity, please use human
body electrostatic discharge ground wire if it is required to directly contact the baseplate when
performing operations, or touch the ground wire (ground wires of fridges, washing machines, etc.)
with bare hands to discharge the static electricity of the human body before carrying out operations.
C. The circuit baseplate mixes high voltage (AC110V, AC220V) and low voltage (12V, 5V), which
may cause electric shock accident; so please do not have direct contact without preparations.

Content
CHAPTER 1:PRODUCT SPECIFICATIONS----------------------------------------------------------------- 1
CHAPTER 2:MAINTENANCE AND STORAGE------------------------------------------------------------- 4
CHAPTER 3:ENGINEERING MODE INSTRUCTION------------------------------------------------------5
3.1 Key Operation:---------------------------------------------------------------------------------------------5
3.2 Display Information:-------------------------------------------------------------------------------------- 7
3.3 P1 Mode:---------------------------------------------------------------------------------------------------- 8
3.4 P2 Mode----------------------------------------------------------------------------------------------------- 9
3.5 P3 Mode--------------------------------------------------------------------------------------------------- 10
3.6 P4 Mode--------------------------------------------------------------------------------------------------- 11
3.7 PU Mode---------------------------------------------------------------------------------------------------12
CHAPTER 4:ERROR CODE------------------------------------------------------------------------------------ 13
CHAPTER 5:TROUBLESHOOTING-------------------------------------------------------------------------- 14
5.1 Wiring Schematic----------------------------------------------------------------------------------------14
5.2 Fail To Start----------------------------------------------------------------------------------------------- 16
5.3 Fail To Start - Continue-------------------------------------------------------------------------------- 17
5.4 Pushrod Motor Does Not Work---------------------------------------------------------------------- 19
5.5 Speak Has No Sound---------------------------------------------------------------------------------- 19
5.6 Individual Air Bag Can Not Be Inflated Or Inflated Sufficiently------------------------------19
5.7 All Air Bags Do Not Work----------------------------------------------------------------------------- 19
5.8 Abnormal Warming Function------------------------------------------------------------------------- 20
5.9 Machine Core Motor Does Not Work-------------------------------------------------------------- 22
5.10 Abnormal Key Function------------------------------------------------------------------------------ 23
5.11 Chair Back Reclines Abnormally------------------------------------------------------------------ 24
5.12 Machine Core Movement Issue--------------------------------------------------------------------24
5.13 E5 Error Code------------------------------------------------------------------------------------------ 26
CHAPTER 6:PARTS REPLACEMENT----------------------------------------------------------------------- 32
6.1 Air Pump--------------------------------------------------------------------------------------------------- 32
6.2 Machine Core-------------------------------------------------------------------------------------------- 35
6.3 Master Control Panel----------------------------------------------------------------------------------- 40
6.4 Footrest---------------------------------------------------------------------------------------------------- 41
6.5 Software Update-----------------------------------------------------------------------------------------44
6.6 Machine Breakdown Drawing------------------------------------------------------------------------ 45
CHAPTER 7:PARTS LIST--------------------------------------------------------------------------------------- 46

1
CHAPTER 1:PRODUCT SPECIFICATIONS

2
CHAPTER 1:PRODUCT SPECIFICATIONS

3
CHAPTER 1:PRODUCT SPECIFICATIONS

4
CHAPTER 2:MAINTENANCE AND STORAGE
To keep the appliance working and looking its best, please follow these cleaning guidelines
once a week.
Area covered with synthetic leather:
For cleaning, wipe the unit with a dry cloth moistened in diluted neutral detergent and
thoroughly wrung out. and then use a dry cloth to wipe the unit again. Thereafter, allow the unit to
dry naturally.
(Excessive use of detergent may harm the synthetic leather surface).
Keep the unit clean and place it in a location with appropriate temperature and avoid moisture
and dust.
Prior to the maintenance work, make sure to disconnect the power cord. Be careful that hands
must not be wet to prevent electric shock or injury.
Do not use benzene, thinner or alcohol to clean the choir, nor spray any liquid containing any
chemical agents to prevent the risk of electric shock or catching fire.
Main body:
Use a dry cloth moistened with diluted neutral detergent and thoroughly wrung out to clean the
plastics or the pipes, and then wipe with a dry cloth to completely remove the residual detergent.
Wipe the coated surface with a dry cloth.
Do not use benzene, thinner, alcohol solvents or abrasives to avoid scratch, discoloration or
cracks on the surface.
Remote controller:
Use a dry cloth to clean the remote controller.
Never use a wet cloth for cleaning to avoid malfunction.
Back pad,pillow,seat cushion and other fabric parts:
Wipe the parts with a dry cloth moistened in diluted neutral detergent and thoroughly wrung out,
and then use a dry cloth to wipe the parts again. Thereafter, allow the parts to dry naturally.
Do not iron to prevent damage to the fabric.
Do not use benzene, thinner, or alcohol for cleaning, nor spray any liquid containing any
chemical agents to prevent damage to the fabric.
Storage:
After cleaning, keep the unit away from humidity. When the unit is not being used for a long
period of time, place a cover over the unit to protect it from dust.
Do not place the unit in areas exposed to direct sunlight, or near heaters, hot air blowers or any
other heating devices to avoid discoloration or deterioration on the surface of the holster.

5
CHAPTER 3:ENGINEERING MODE INSTRUCTION
3.1 Key operation:
A. When the power is on and manual controller is not yet activated(before enter the main
interface), press point and heat on the manual controller at the same time for 5 seconds and the
controller will display “ - - ”
+ =

6
CHAPTER 3:ENGINEERING MODE INSTRUCTION
B.Then press full back key to enter engineering mode
C.In the engineering mode,“ P0 ” will be displayed
D.Use up and down to select 8 modes, including P0~P4+P7+P8+PU
&
E.In mode selection state, press OK to enter the mode to operate the massage chair
F.After mode selection, use up and down again to select the element to be controlled, such as
A0~A5
G.After element selection, use massage intensity strong and weak to adjust the element speed,
and the intensity will be displayed as the air pressure strength, with one to three representing from
weak to strong

7
CHAPTER 3:ENGINEERING MODE INSTRUCTION
H.strong or weak air pressure strength will make the selected element forward or reverse (if
such element has no forward and reverse states, it will be in motion state)
I.After entering the mode, press stop key to return to the previous layer of menu; this key has
the same function as the ESC key of the computer keyboard
3.2 Display information: